Editing dialoge has malfunction

when i use editing dialoge it doesnot respond and it seems to has something wrong

Welcome to the forum! Hm is this the latest Collabora Online? Which version are you running? And is this on desktop? It looks like it is on iPad(?)

It’s the latest version, Ian using Samsung tablet S7 plus, and it’s Android system

Yes, this is a known issue with the Android app.